When two atoms combine by sharing electrons, it is a(n) bond.
a. ionic
b. covalent

The use of logic making empirical observations and performing dissections were all part of the scientific studies by

Which best explains why viruses do not have special structures or enzymes that allow them to make their own food? viruses can use energy in living cells that they infect. viruses can replicate inside a host that they infect. viruses can cause contagious illnesses in host cells. viruses integrate their rna or dna into infected cells.

What is the inability of an individual or a society to achieve a minimum standard of living known as ?